Condensed Consolidated Statements of Cash Flows and Supplemental Cash Flow Information (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities:
Net loss	$ (23,876)	$ (795)
Reconciliation of net loss to cash used in operations:
Accretion of asset retirement obligations	268	263
Amortization of debt discount		30
Amortization of notes receivable discount	(337)	(363)
Amortization of non-cash investor relations fees	13	100
Loss on extinguishment of convertible debt		39
Loss on sale of marketable securities	93
Costs incurred for restoration and reclamation activities	(355)	(30)
Depreciation and amortization	67	77
Stock compensation expense	162	38
Common stock issued for purchase of lithium mineral interests	114
Common stock issued for consulting services	95
Gain on disposal of fixed assets	(8)	(4,927)
Impairment of uranium properties	17,968
Effect of changes in operating working capital items:
Increase in receivables and other	(6)	(5)
Decrease in prepaids and other	202	73
Decrease in payables and deferred credits	(490)	(834)
Net Cash Used In Operating Activities	(6,090)	(6,334)
Cash Flows From Investing Activities:
Proceeds from the sale of securities, net	476
Proceeds from disposal of property, plant and equipment	8	1,950
Proceeds from note receivable	1,089
Acquisition of Alabama Graphite, net of cash acquired	(1,547)
Net Cash Provided By Investing Activities	26	1,950
Cash Flows From Financing Activities:
Payments on borrowings		(5,500)
Issuance of common stock, net	4,730	13,705
Payment of minimum withholding taxes on net share settlements of equity awards	(5)	(1)
Net Cash Provided By Financing Activities	4,725	8,204
Net (decrease)/increase in cash, cash equivalents and restricted cash	(1,339)	3,820
Cash, cash equivalents and restricted cash, beginning of period	7,722	7,273
Cash, Cash Equivalents and Restricted Cash, End of Period	6,383	11,093
Cash paid during the period for:
Interest	3	227
Supplemental Non-Cash Information for Investing and Financing Activities:
Securities received for payment of notes receivable - Laramide	750
Securities received for asset disposal - Laramide		568
Common stock issued for acquisition of Alabama Graphite	6,394
Stock options and warrants issued for acquisition of Alabama Graphite	89
Common stock issued for consulting services	95
Common stock issued for purchase of lithium mineral interests	114
Total Non-Cash Investing and Financing Activities for the Period	$ 7,442	$ 568